12166857 has 12 divisors (see below), whose sum is σ = 17605744. Its totient is φ = 8096760.

The previous prime is 12166853. The next prime is 12166879. The reversal of 12166857 is 75866121.

It is not a de Polignac number, because 12166857 - 2² = 12166853 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12166853) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 7182 + ... + 8712.

Almost surely, 2^12166857 is an apocalyptic number.

It is an amenable number.

12166857 is a deficient number, since it is larger than the sum of its proper divisors (5438887).

12166857 is a wasteful number, since it uses less digits than its factorization.

12166857 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2420 (or 2417 counting only the distinct ones).

The product of its digits is 20160, while the sum is 36.

The square root of 12166857 is about 3488.1022060714. The cubic root of 12166857 is about 229.9990989253. Note that the first 3 decimals are identical.

The spelling of 12166857 in words is "twelve million, one hundred sixty-six thousand, eight hundred fifty-seven".